Compositions – Electrically conductive or emissive compositions – Free metal containing
Reexamination Certificate
2006-07-25
2006-07-25
Kopec, Mark (Department: 1751)
Compositions
Electrically conductive or emissive compositions
Free metal containing
C252S500000, C252S503000, C252S511000, C252S519300, C427S212000, C427S216000, C427S220000, C428S357000
Reexamination Certificate
active
07081214
ABSTRACT:
This invention provides a low-temperature sintering conductive paste for high density circuit printing which can form a fine circuit having good adhesive force, a smooth surface and low resistance when applied on a substrate and then baked; the conductive paste of the invention uses, as conductive media, in combination with metal fillers having an average particle diameter of 0.5 to 20 μm, ultrafine metal particles having an average particle diameter of not larger than 100 nm, which are set in the state that the surfaces thereof are coated with one compound or more having a group comprising a nitrogen, oxygen, or sulfur atom and capable of coordinate-bonding by a lone pair existing in the atom, as a group capable of coordinate-bonding to a metal element contained in the ultrafine metal particles, and are dispersed uniformly in a resin composition comprising a heat curable resin component, an organic acid anhydride or a derivative thereof or an organic acid, and one or more organic solvent; and thereby it enables low-temperature sintering of the ultrafine metal particles during a heat treatment at a low temperature.
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Goto Hideyuki
Oosako Katsuhisa
Saito Norimichi
Ueda Masayuki
Knobbe Martens Olson & Bear LLP
Kopec Mark
ULVAC Inc.
Vijayakumar Kallambella
LandOfFree
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